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Thread: where to cut hole for 69 MFI adjustment?

  1. 11-24-2014, 08:19 AM #1
    xpensivewino
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    where to cut hole for 69 MFI adjustment?

    I was wondering if anyone has a picture or measured dimensions as to where to cut the hole in a 69 engine shroud to adjust the idle on the MFI pump. My understanding is that the 69 only tool that was on offer is a crappy design. I'm about to install my shroud on my engine build, and want to cut the hole so I can adjust the idle like in the 70 and later cars. Any help would be appreciated...Thanks Steve
    1969 911 E #824
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  2. 11-24-2014, 12:22 PM #2
    gled49
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    Install fan housing, shroud, MFI pedestal and pump. Stick adjusting tool thru fan and drill small hole to check alignment. Enlarge hole in the direction needed. About +\- 20mm. I use a die grinder with a small bur. gled
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  3. 11-24-2014, 12:27 PM #3
    xpensivewino
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    Thanks Gled, I was looking for a more precise location before I install the bits, but this may be the way I need to go. I will try to search or a close up photo of an MFI shroud as well..Thanks again
    1969 911 E #824
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  4. 11-24-2014, 06:58 PM #4
    gled49
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    69 shroud has a little different shape than later shrouds. Trial and hopefully not error is your friend. I have fitted lots of repo shrouds and amber race shrouds, and put it on and take it off and grind is the only way.
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  5. 12-20-2014, 08:23 AM #5
    VZ935
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    My 69S is getting painted right now and the engine is on a stand. if there is a specific photo you need let me know and I would be happy to take it for you if it helps for location.



    935 Owners Registry #02
    1969 911S, 1970 Euro 914-6
    935 1978
    Copeman Porsche 911 IMSA GTO
    1981 924 Carrera GT
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  6. 12-20-2014, 10:01 AM #6
    RSTarga
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    The hole is almost the size of a quarter so precision is not needed. Use a scribe point and lay it around the adjusting screw marking the small diameter on the shroud. You should have the approximate center with that.
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs
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  7. 12-20-2014, 06:16 PM #7
    xpensivewino
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    Thanks so much guys. I was able to get an approximate measurement and reproduce the location. Nice looking engine by the way...Cheers Steve
    1969 911 E #824
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